ios - Cropping UIImagePickerControllerOriginalImage using UIImagePickerControllerCropRect returns incorrect image -

-

i trying edit captured image , save gallery. have made 

uiimagepickercontroller *picker=[[uiimagepickercontroller alloc] init]; picker.allowseditting=yes;

i want save image in editable square portion , save gallery. know can make use of [info objectforkey:@"uiimagepickercontrollereditedimage"] save editted image. returns me image of dimension 320x320(ipad mini) , image of poor quality. planned crop original image [info objectforkey:@"uiimagepickercontrolleroriginalimage"] using following code:

cgrect rect = [[info objectforkey:@"uiimagepickercontrollercroprect"]cgrectvalue]; uiimage *originalimage=[info objectforkey:@"uiimagepickercontrolleroriginalimage"]; cgimageref imageref = cgimagecreatewithimageinrect([originalimage cgimage], rect); uiimage *result = [uiimage imagewithcgimage:imageref                                       scale:originalimage.scale                                 orientation:originalimage.imageorientation]; cgimagerelease(imageref);

then saved both result image , edited image ([info objectforkey:@"uiimagepickercontrollereditedimage"]). when compared both images, dint match. have attached edited , cropped images. ultimate aim crop original image image in editable square portion , save gallery image quality. can please tell me on goes wrong here , me fix issue?

thanks in advance.cropped image

edited image

i found out reason why cropping went wrong here. image returned uiimagepickercontrolleroriginalimage rotated -90 degrees. cropping on rotated image returned me incorrect cropped image. rotated image 90 degrees , cropped it. got expected cropped image quality. below code solved issue.

 uiimage *originalimage = [info objectforkey:@"uiimagepickercontrolleroriginalimage"];     cgrect rect=[[info objectforkey:@"uiimagepickercontrollercroprect"]cgrectvalue];     uiimage *rotatedoriginalimage=[originalimage imagerotatedbydegrees:90.0];     cgimageref imageref = cgimagecreatewithimageinrect([rotatedoriginalimage cgimage], rect) ;     uiimage *croppedimage = [uiimage imagewithcgimage:imageref];

code rotate image:

- (uiimage *)imagerotatedbydegrees:(cgfloat)degrees{ // calculate size of rotated view's containing box our drawing space uiview *rotatedviewbox = [[uiview alloc] initwithframe:cgrectmake(0,0,self.size.height, self.size.width)]; cgaffinetransform t = cgaffinetransformmakerotation(degreestoradians(degrees)); rotatedviewbox.transform = t; cgsize rotatedsize = rotatedviewbox.frame.size;   // create bitmap context uigraphicsbeginimagecontext(rotatedsize); cgcontextref bitmap = uigraphicsgetcurrentcontext();  // move origin middle of image rotate , scale around center. cgcontexttranslatectm(bitmap, rotatedsize.width/2, rotatedsize.height/2);  //   // rotate image context cgcontextrotatectm(bitmap, degreestoradians(degrees));  // now, draw rotated/scaled image context cgcontextscalectm(bitmap, 1.0, -1.0); cgcontextdrawimage(bitmap, cgrectmake(-self.size.height / 2, -self.size.width / 2, self.size.height, self.size.width), [self cgimage]);  uiimage *newimage = uigraphicsgetimagefromcurrentimagecontext(); uigraphicsendimagecontext(); return newimage; }

Comments

Post a Comment

Popular posts from this blog

java - activate/deactivate sonar maven plugin by profile? -

-
i use sonar plugin executes if activated in maven profile. sonar runs on every compile. the problem build fail other team members not have sonar application installed locally. pom.xml checked in team members same copy including sonar configuration, don't want them modify purpose of disabling sonar (they might inadvertently check modified copy in). please advise how configure maven (.m2/settings.xml) and/or pom.xml sonar feature can enabled/disabled local profile. here sonar configuration in each project's pom.xml: <plugin> <groupid>org.codehaus.mojo</groupid> <artifactid>sonar-maven-plugin</artifactid> <version>1.0</version> <executions> <execution> <id>make-sonar</id> <phase>compile</phase> <goals> <goal>sonar</goal> </goals> </execution> </executions> ...
Read more

python - TypeError: can only concatenate tuple (not "float") to tuple -

-
i'm new python, question might easy, anyway, patience: as trying call newton-raphson method calculate implied volatility in black-scholes formula call/put option pricing, first thing is, newton method in scipy.optimize seems calculate function's zeros, in black-scholes formula, want function's value option price, not zero. (i'm new here programming, i'm not sure techniques.) should write function things like: def f(sigma, price): return bsformula(s0,k,r,t,q,sigma) - price then, while calling newton method, takes args=() 1 parameter in function, write this: value = newton(bsprice2, 0.5, args=price) but error message: file "bs.py", line 36, in bsimpvol value = newton(bsprice2, 0.5, args=float(price)) file "/usr/lib/python2.7/dist-packages/scipy/optimize/zeros.py", line 143, in newton q0 = func(*((p0,) + args)) typeerror: can concatenate tuple (not "float") tuple could tell me why that? how fix it? apprecia...
Read more

java - What is the difference between String. and String.this. ? -

-
this question has answer here: meaning of .this , .class in java 2 answers i'll straight point. im still learning bit of syntax , want know difference between code is code a: public class buttonz extends jbutton{ public buttonz(){ settext(new string(string.valueof(i))); } } please ignore fact i undeclared, not lost. code b: public class buttonz extends jbutton{ public buttonz(){ settext(new string(string.this.charat(i))); } } what don't yet understand difference in typing string.this , string. i under assumption when use dot operator on class accessing it's static methods(and/or variables if they're not hidden). i have studied little bit , have concluded when using string. accessing string static methods.. when using string.this. i'm accessing methods class buttonz extendi...
Read more